i got a quicksilver some time ago and it came with os 10 installed but no os 9 . This week I put on os9 on it only to find that there is no support for os9 at the ati site. the machine wold crash after startup. i did find that is would run with extensions off or if you pulled the ati acceleration extension files to the desk top it would boot and run. i did find a site that had an copy of the ati software that fixed the problem finally. FYI